CN102621387A - Shaking type power frequency impedance meter - Google Patents
Shaking type power frequency impedance meter Download PDFInfo
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- CN102621387A CN102621387A CN2012101019909A CN201210101990A CN102621387A CN 102621387 A CN102621387 A CN 102621387A CN 2012101019909 A CN2012101019909 A CN 2012101019909A CN 201210101990 A CN201210101990 A CN 201210101990A CN 102621387 A CN102621387 A CN 102621387A
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Abstract
The invention discloses a shaking type power frequency impedance meter, and relates to the technical field of impedance detection. The impedance meter comprises a casing and a detection circuit installed inside the casing, wherein the detection circuit comprises a hand generator, the output end of the hand generator is connected with an electronic voltage stabilizer, the output end of the electronic voltage stabilizer is connected with a power frequency generator, the output end of the power frequency generator is connected with a power amplifier, the output end of the power amplifier is connected with an external element to be tested, and the output end of the power amplifier is connected with a display screen. The shaking type power frequency impedance meter disclosed by the invention has the advantages that the impedance of the current transformer is simply and rapidly detected, and the impedance value is displayed at the same time.
Description
Technical field
The present invention relates to the impedance detection technical field, specifically is a kind of hand-rail type power frequency impedance table, is suitable for to measure corresponding resistance, inductance, capacitor element and inductive, capacitive circuit, and megger is used in the power frequency impedance measurement that is specially adapted to yearly survey and verification.
Background technology
Known megger is to be used for measuring megohm class B insulation resistance.Have simple and reliable convenient and practical characteristics.And power frequency impedance is measured to prolong always and is used current and voltage method.Relay protection of power system and electric energy metrical professional staff are operated in the accuracy rating in order to make protective relaying device correct operation, electric energy meter meter, need measure impedance to the secondary current loop of current transformer.And the impedance measurement working site often acquires a certain degree of difficulty.The one, there is not suitable impedance measuring Instrument, the 2nd, the current and voltage method of using always is measured impedance and is not only required the scene that 220 volts of power supplys of interchange will be arranged, also will be the pressure regulator of heaviness, isolating transformer, interim test board is formed in electric current, voltage table field wiring.Surveying work only needs 2～3 minutes, and preliminary work needs 30 minutes at least, inefficiency.More serious is that the switchette station, the transformer station that have just do not have 220 volts of power supplys to supply to use at all, and it is not in place to cause this project work to be implemented.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the present invention provides a kind of hand-rail type power frequency impedance table, and the impedance of simple fast detecting current transformer shows resistance value simultaneously.
The present invention realizes with following technical scheme: a kind of hand-rail type power frequency impedance table; Comprise housing and be installed in installation one testing circuit in the housing, described testing circuit comprises hand generator, and the hand generator output terminal connects electronic regulator; The output terminal of electronic regulator connects the power frequency generator; The output terminal of power frequency generator connects power amplifier, and the output terminal of power amplifier is connected with outside element under test, and the output terminal of power amplifier connects a display screen.
Principle of work is: the output voltage of hand generator is through the working power of electronic regulator voltage stabilizing as power frequency generator, power amplifier; Power supply is through the electronic regulator voltage stabilizing; The power frequency generator produces sinusoidal wave stabilization signal; Form measuring current through power amplifier, the output voltage of power amplifier, electric current, waveform, frequency are enough stable, the coincidence measurement requirement.
The invention has the beneficial effects as follows: the secondary circuit impedance measurement work that makes current transformer becomes extremely simple as the megger measurement insulation resistance by complicacy, only need shake hand generator and get final product.
Description of drawings
Year the present invention is described further below in conjunction with accompanying drawing.
Fig. 1 is the testing circuit theory diagram;
Fig. 2 is testing circuit figure;
Fig. 3 is the shell structure synoptic diagram.
Among the figure: 1, impedance detection port, 2, waveform, frequency detecting port, 3, placing hole, 4, display screen 5, crank interface, 6, potentiometer RP2 regulates port, 7, handle.
Embodiment
As shown in Figure 1, a kind of hand-rail type power frequency impedance table is made up of housing and the testing circuit that is installed in the housing.Testing circuit has a hand generator; The hand generator output terminal connects electronic regulator; The output terminal of electronic regulator connects the power frequency generator; The output terminal of power frequency generator connects power amplifier, and the output terminal of power amplifier is connected with outside element under test, and the output terminal of power amplifier connects a display screen.Wherein, the power frequency generator is 50 Hertzian oscillators, and power amplifier adopts the BTL power amplifier.
As shown in Figure 2, at power amplifier output terminal resistance in series R9, R10, be parallel with the potentiometer RP2 and the resistance R 11 of series connection at the two ends of resistance R 10; Resistance R 9 is drawn as waveform and frequency detecting end; Potentiometer RP2 is used for verification.The above-mentioned resistance of series connection in the testing circuit, it is high to have improved circuit stability, make measure with electric current between 0.1～1.99 ohm of the measurement range during variation variable quantity be not more than one of percentage, satisfy the requirement of 1 grade of measuring accuracy.
As shown in Figure 3; Housing is a rectangular shape; Periodic check is provided with impedance detection port one, waveform, frequency detecting port 2 and potentiometer RP2 and regulates port 6 in the upper surface of housing for ease, and the power amplifier output terminal is arranged in the impedance detection port one; The two ends of resistance R 9 are arranged in waveform, the frequency detecting port 2, and potentiometer RP2 is installed in potentiometer RP2 and regulates in the port 6.Display screen 4 is arranged on the upper surface of housing, is used for conveniently seeing the demonstration resistance value.Positive end face at housing is provided with crank interface 5, the crank corresponding end is put into interface can use.Carry crank for ease, housing is provided with the placing hole 3 that is used to place the hand generator crank.Handle 7 is set on the housing, can be convenient for carrying this device.Housing adopts the aluminium shell, the simple metal hand generator, and circuit component is ripe, and is sturdy and durable.
Method of application: in tested loop or element do not have under the condition of voltage, element under test is installed in the impedance detection port, shakes hand generator with the per minute 90 right speed that turns left, the stationary value that display screen shows is the measured impedance value.Can this table of quiz before using, 1, open a way slotted line, the stationary value of display screen demonstration is an overrange 1..2, the slotted line short circuit, the stationary value that display screen shows is 0.00..During this table of year test, insert 1 ohm of measuring resistance at p-wire, the measured value of this table should be 1.00, can align the potentiometer RP2 of correcting current when inaccurate.Can utilize the voltage port measured waveform and the frequency of extraction when having relatively high expectations.
Claims (5)
1. hand-rail type power frequency impedance table; Comprise housing and the testing circuit that is installed in the housing, it is characterized in that: described testing circuit comprises hand generator, and the hand generator output terminal connects electronic regulator; The output terminal of electronic regulator connects the power frequency generator; The output terminal of power frequency generator connects power amplifier, and the output terminal of power amplifier is connected with outside element under test, and the output terminal of power amplifier connects display screen.
2. a kind of hand-rail type power frequency impedance table according to claim 1, it is characterized in that: described power frequency generator is 50 Hertzian oscillators.
3. a kind of hand-rail type power frequency impedance table according to claim 1 and 2 is characterized in that: at power amplifier output terminal resistance in series R9, R10, be parallel with the potentiometer RP2 and the resistance R 11 of series connection at the two ends of resistance R 10; Resistance R 9 is drawn as waveform and frequency detecting end; Potentiometer RP2 is used to revise measuring current.
4. a kind of hand-rail type power frequency impedance table according to claim 3; It is characterized in that: described housing is a rectangular shape; Be provided with impedance detection port (1), waveform, frequency detecting port (2) and potentiometer RP2 in the upper surface of housing and regulate port (6); The power amplifier output terminal is arranged in the impedance detection port (1), and the two ends of resistance R 9 are arranged in waveform, the frequency detecting port (2), and potentiometer RP2 is installed in potentiometer RP2 and regulates in the port (6); Display screen (4) is set in the upper surface of housing, crank interface (5) is set at the positive end face of housing.
5. a kind of hand-rail type power frequency impedance table according to claim 4 is characterized in that: on housing, be provided with one be used to place the hand generator crank placing hole (3), handle (7) is set on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210101990.9A CN102621387B (en) | 2012-04-10 | 2012-04-10 | A kind of hand-rail type power frequency impedance table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210101990.9A CN102621387B (en) | 2012-04-10 | 2012-04-10 | A kind of hand-rail type power frequency impedance table |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102621387A true CN102621387A (en) | 2012-08-01 |
| CN102621387B CN102621387B (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210101990.9A Active CN102621387B (en) | 2012-04-10 | 2012-04-10 | A kind of hand-rail type power frequency impedance table |
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| CN (1) | CN102621387B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321374A (en) * | 2016-09-22 | 2017-01-11 | 徐汉武 | Portable mobile generator |
| CN110196374A (en) * | 2019-06-21 | 2019-09-03 | 中船黄埔文冲船舶有限公司 | A kind of machine winding first and last end condition discriminating apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87212559U (en) * | 1987-12-07 | 1988-09-14 | 上海第六电表厂 | Megger with commohn marking scale |
| CN201740818U (en) * | 2010-07-27 | 2011-02-09 | 山东省电力学校 | Hand generation rechargeable megohmmeter |
| CN102032128A (en) * | 2010-11-29 | 2011-04-27 | 江苏省电力公司徐州供电公司 | Detector for hand-operated high-voltage electroscope |
| CN202548212U (en) * | 2012-04-10 | 2012-11-21 | 江苏省电力公司徐州供电公司 | Hand-driven power frequency impedance meter |
-
2012
- 2012-04-10 CN CN201210101990.9A patent/CN102621387B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87212559U (en) * | 1987-12-07 | 1988-09-14 | 上海第六电表厂 | Megger with commohn marking scale |
| CN201740818U (en) * | 2010-07-27 | 2011-02-09 | 山东省电力学校 | Hand generation rechargeable megohmmeter |
| CN102032128A (en) * | 2010-11-29 | 2011-04-27 | 江苏省电力公司徐州供电公司 | Detector for hand-operated high-voltage electroscope |
| CN202548212U (en) * | 2012-04-10 | 2012-11-21 | 江苏省电力公司徐州供电公司 | Hand-driven power frequency impedance meter |
Non-Patent Citations (3)
| Title |
|---|
| 徐杰等: "超级电容和微型手摇发电机在手持式数显轨道测量尺中的应用", 《齐齐哈尔大学学报》 * |
| 李德超等: "两种杆塔接地电阻测量方法的比较", 《电磁避雷器》 * |
| 柳涌: "《建筑电气设备施工技术手册》", 31 December 2010 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321374A (en) * | 2016-09-22 | 2017-01-11 | 徐汉武 | Portable mobile generator |
| CN110196374A (en) * | 2019-06-21 | 2019-09-03 | 中船黄埔文冲船舶有限公司 | A kind of machine winding first and last end condition discriminating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102621387B (en) | 2015-08-19 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU ELECTRIC POWER COMPANY STATE GRID CORPORAT Effective date: 20121108 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20121108 Address after: 221006 Jiefang North Road, Jiangsu, Xuzhou, No. 20 Applicant after: Xuzhou Power Supply Company of Jiangsu Electric Power Company Applicant after: Jiangsu Electric Power Company Applicant after: State Grid Corporation of China Address before: 221006 Jiefang North Road, Jiangsu, Xuzhou, No. 20 Applicant before: Xuzhou Power Supply Company of Jiangsu Electric Power Company |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |